The only important thing here is whether or not that was a legal area. Most municipalities have ordinances against the discharging of weapons for an unlawful purpose. Hunting ofcourse is a lawful purpose.
The cops were obviously ignorant of hunting laws in general so your ticket might just be incorrect. You should first determine if the area you were hunting was within a park boundary. Then, if it was not, you should dtermine if you were 450 feet from a occupied building or school playground.
If you are clear on both of these points, you might consider calling your local fish&game enforcement office and ask to speak to a game warden so he might weigh in on the issue.
You do have riparian rights but some towns simply ban all hunting within their boundaries.
Lastly, speaking to the prosecuter in the case with all your findings before the actual case is called may just get everything dropped.
I love to hunt geese myself but avoid any areas that might disturb persons with a propensity to call cops. There are so many places to hunt these critters without aggravating yourself.
May I ask where you were hunting?